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BQ78350-R1A
SLUSE05 –DECEMBER 2019
BQ78350-R1A CEDV Li-Ion Gas Gauge and Battery Management Controller Companion to
the BQ769x0 Battery Monitoring AFE
1 Features
2 Applications
1
•
Compensated end-of-discharge voltage (CEDV)
gauging algorithm
•
Light electric vehicles (levs): ebikes, escooters,
pedelec, and pedal-assist bicycles
•
•
Supports SMBus host communication
•
•
Power and gardening tools
Flexible configuration for 3- to 5-series
(BQ76920), 6- to 10-series (BQ76930), and 9- to
15-series (BQ76940) li-ion and LiFePO4 batteries
Battery backup and uninterruptible power supply
(UPS) systems
•
•
•
Wireless base station backup systems
Telecom power systems
•
•
Supports battery configurations up to 320 Ahr
Supports charge and discharge current reporting
up to 320 A
Handheld vacuum cleaners and robot vacuums
•
•
On-chip temperature sensor option
3 Description
The Texas Instruments BQ78350-R1A li-ion and
LiFePO4 Battery Management Controller and
companion to the BQ769x0 family of analog front end
(AFE) protection devices provides a comprehensive
set of Battery Management System (BMS)
External NTC thermistor support from companion
AFE
•
Full array of programmable protection features
–
–
Voltage, current, and temperature
System components
subsystems,
helping
to
accelerate
product
development for faster time-to-market.
•
•
Lifetime data logging
The BQ78350-R1A controller and the BQ769x0 AFE
support 3-series to 15-series cell applications. The
BQ78350-R1A device provides an accurate fuel
gauge and state-of-health (SoH) monitor, as well as
cell balancing and a full range of voltage-, current-,
and temperature-based protection features.
Supports CC-CV charging, including precharge,
charge inhibit, and charge suspend
•
Offers an optional resistor programmable SMBus
slave address for up to eight different bus
addresses
•
•
Drives up to a 5-segment LED or LCD display for
state-of-charge indication
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
Provides SHA-1 authentication
BQ78350-R1A
TSSOP (30)
7.80 mm x 6.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
PACK+
bq76920
BAT
VC5
VC4
VC3
VC2
VC1
VC0
SRP
SRN
ALERT
REGSRC
REGOUT
CAP 1
LED1
LED2
LED3
LED4
LED5
VCC
MRST
BAT
TS 1
SCL
SDA
VSS
CHG
DSG
VAUX
KEYIN
PRES
RBI
PWRM
DISP
PUSH-BUTTON
FOR BOOT
SAFE
VSS
COM
VEN
SCL
SDA
SMBC
SMBC
ALERT
PRECHG
GPIOA
SMBD
SMBA
SMBD
PACK–
ADREN
GPIOB
Copyright © 2017, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.